Atanks is a multi-platform Scorched Earth clone
similar to the Worms series of games. Annihilate the other tanks to earn money, then spend it on bigger and better
shields and weapons to wipe out the opposition. It
features a wide array of weapons, AI players, destructible
landscape, weather, parachutes, teleports and a
wide range of other features.

Atoms for PalmOS is a two player game. Each turn a player can place an atom inside a square. If the square is full then it will explode by placing one atom in every neighbour square, and any enemy atoms there are taken over by you.

Audiality is a highly scalable and portable audio engine and
synthesizer. MIDI files are used in combination with scripting and
modular synthesis, to minimize file sizes and maximize flexibility.
Audiality can be used as a music and sound effects player in
multimedia productions, or as a realtime MIDI synthesizer.

The Automagical Sudoku Solver attempts to solve
Sudoku puzzles for you using various techniques.
Although it has come a long way, there are still
some tough puzzles that it can't solve. Puzzles
are entered in the text file provided, and "ass
&lt; foo" will solve your puzzle in a pinch.

Automanic is a vehicular deathmatch game,
hopefully becoming the best of Twisted Metal,
Interstate '76, the Burnout Games, and
Carmageddeon. It focuses on cross-country carnage.
It uses Crystal Space, CEL, and ODE, and is
written in C++ and Python.

Avadan is a role-playing game situated in space.
The player travels from planet to planet in order
to find the mystical oracles. The player is placed
in nethack-style dungeons. The whole game is
rogue-like, but with the extension of space
travels. The dungeons are shown with tile
graphics, and space looks a bit better. On space
stations, the player can talk to NPCs, get quests,
and trade artifacts found in the dungeons.

Aviascene is a virtual environment for remote exploration.
Users can download actual earth topography and surface
data from USGS, then go exploring. If they get lost, they
can launch an aircraft to reconnoiter. It features a high-
performance adaptive OpenGL terrain renderer, airplane
and wheeled vehicle physics models, and the ability to mark
waypoints at GPS coordinates. It can be used to plan a
backpacking trip or just as a flight simulator.

Avoid The Roid is a game similar to asteroids. It was originally based on Maelstrom for Linux. It has both single and multiplayer modes and runs on Linux, Windows 2000/XP, and possibly other platforms.

Avoid The Roid 3D is a 3D asteroids-like
multiplayer game. The player flies around in a
three dimensional space, shooting asteroids and
other ships while trying to avoid running into any
of them or being shot.